2015/07/30 by Cosimo Bambi, M. Ghasemi-Nodehi, D. Rubiera-Garcia +1
Engineering · Mathematics · Physics and Astronomy · #Action (physics) #Affine transformation #Astrophysics #Black Holes and Theoretical Physics #Classical mechanics #Computer science #Cosmological constant #Cosmology #Cosmology and Gravitation Theories #Engineering #General relativity #Gravitation #Gravitational constant #Mathematical physics #Mathematics #Metric (unit) #Noncommutative and Quantum Gravity Theories #Physics #Pure mathematics #Quantum gravity #Quantum mechanics #Space (punctuation) #Theoretical physics #f(R) gravity #gr-qc
paper · pdf · doi:10.1103/physrevd.92.044016
published as Phys. Rev. D 92, 044016 (2015) · 9 pages, 4 figures, some differences with respect to the version accepted for publication
arxiv created 2015/07/30 · openalex publication_date 2015/08/11 · arxiv updated 2015/08/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider metric-affine scenarios where a modified gravitational action is sourced by electrovacuum fields in a three dimensional space-time. We first study the case of f(R) theories, finding deviations near the center as compared to the solutions of general relativity. We then consider Born-Infeld gravity, which has raised a lot of interest in the last few years regarding its applications in astrophysics and cosmology, and show that new features always arise at a finite distance from the center. Several properties of the resulting space-times, in particular in presence of a cosmological constant term, are discussed.